What specific fibrous material gives the Wool Carder Bee its common name?

Answer

Soft, hairy fiber scraped from plants

The common name, Wool Carder Bee, directly relates to a unique and essential behavior performed by the female during nest construction. This behavior involves actively seeking out and scraping soft, hairy, or woolly fiber directly from the surface of specific plants. This collected material is then used to construct the individual cells within her solitary nest. This reliance on plant fuzz distinguishes the species and forms the basis for predicting local density, as gardens rich in these fibrous materials are highly attractive nesting sites for the females preparing for reproduction.

What specific fibrous material gives the Wool Carder Bee its common name?
locationinsectbeeWool Carder Bee